Gold filled jewelryis composed of a solid layer of gold and must constitute at least 5% of the item's total weight. It's mechanically bonded to sterling silver or abase metal. High-quality gold-filled pieces have the same appearance as 14kt gold (58%) gold. Gold filled items, even with daily wear, can last up to 10 years but will eventually wear through. The gold on gold filled jewelry is 5 to 10 times thicker than regular gold plating.